Pressure-regulator.



T. MONTGOMERY.

PRESSURE REGULATOR.

APPLICATION FILED MAR. Z, 1908.

Patented Mar. 16, 1909.

T Mor/gom w THOMAS MONTGOMERY, or sARNIA', ONTARIO, CANADA.

. PRESSURE-RE GULATOR.

Specification of Letters Patent.

Patented March 16, 1909.

Application led March 2, 1908. Serial No. 418,885.

To all whom it may concern:

Be it known that I, THOMAS MONTGOM ERY, of the town of Sarnia, in thecounty of Lambton, in the Province of Ontario, Canada, have inventedcertain Improvementsrin Pressure Regulators, of which the followingis'the specification.

My invention relates to improvements in automatic regulating devices forcontrolling 'fan engines for producing forced or induced drafts forboilers, and the object of the invention is to devise a simple, positiveand quick acting valve of this class whereby a uniform steam pressure inthe boiler may be maintained continuously.

A further object is to provide a means for cleansing the valve duringthe running of the engine without detaching any of the working arts. p Astill further Object is to make the device operable as a pressurereducing valve.

To effect these objects l have constructed my valve in the manner, whichI shall presently describe.

The invention is 'shown in the accompanying drawing which shows asectional view of the device.

A is a chamber which is designed to be filled with air or other'expansive Huid from the inlet Aand hermetically sealed, B isa gagewhich indicates the air pressure in chamber A. 'When the device is usedto regulate the speed of fan engines and the like, the pressure of airin chamber A should be the same as the steam pressure required in theboiler. When the device is used to reduce or regulate pressure of gas orHuids,

. as hereinafter described, the air pressure in chamberA should be thesame as the pressure required for the gas or fluid to lated.

C is the valve casing, which is laced on the steam line leading fromthe/bol er to the fan engine and is provided with the oppositely locatedports C and C2 into which the pipe line is fitted.

A2 isthe top of the chamber, A and A3 is the central or1iice in the top.

D is a diaphragm supported on the Outer periphery between suitable edgepacking rings D.

D2 is a sup lemental be regutop, which is suitably yfastened to t e toA2 preferably around the edge and provide with a'chamber D3 having newand useful 'such aw an opening D4 closed by a screw plug D2.`

with annular corrugations as indicated.

E is a pin having a flanged bottom E, which rests centrally on the plateD.

E2 is av pointed yminor pin held in the to of the pin E and contactingwiththe lever F.

It will be noted that the orifice A4 through which the pin E extends islarger than the pin, thereby leaving an annular orifice to allow steamlpressure to act upon the upper side of the diaphragm D as willhereinafter appear. i

lrl is a flanged screw ring, which fits the orifice in the top of thechamber D3.

H is a jaw pin having the aw lowermost, pin extending through the ring Hand being held in position at the top by a nut H2. .g The lever Fhereinbefore referred to is fulcrumed on a pin G extending through thejaws. of the in H. v

I is a ho ow bearing standard, which is screwed into the bottom of thevalve casing C and into the top of the chamber D2.

C3 is the valve rod, which lextends through the bearings, inthestandardvl, and C4 is a double partition forming a chamber in the centerof the valve casing C.

, C5 is the double connected valve, the top and'bottom disks of whichfit inthe oriiices C2 and C7 respectively in the partition C4 The top ofduced screw extension C2.

J is a nut, which is heldk on the flange K at the bottom of the rod K,which at the top is Both the top A2 and the top D2 are provided` pY cothe valve is provided with a reprovided with a hand Wheel K2 and extendsy through a stuffing box or gland.

J is a spiral spring extending between the' nut J and the stufiing box.

The full steam pressure is exerted on the top-of the diaphragm D. Whenthe steam pressure falls below that of the airipressure in the chamber Athe expansion o the air forces the diaphragm 4D upwardly. The movementof such diaphragm is transmitted throu h the lever F and the valve rodC3 to the va ve C5 lifting the lsamefrom its seat and allowing moresteam to pass to the engine,- thus increasing in speed,V driving the fanfaster, and thereby creating more draft and air pressure andlconsequently raising the steam pressure. When, however, the steampressure arrives at a Oint above that of the air pressure the diap ragmis forced downwardly. The spring J then forces the valves of steam tothe engine `and decreasing its speed and consequently diminishing orshutting olf the draft. The required amount of the lap of the valve onthe seat is arranged for by the turning of the hand wheel K2 to theright or left allowing the minimum speed of the engine to be controlled.

:The maximum speed of the engine is controlled by the throttle valveclose to the engine.

lf for any reason the valve C5 should stick on its seat or not workfreely it may be re lieved by operating the hand wheel K2. Again if anydifference in pressure on either side of the diaphragm should becomeexcessive the corrugations in the to A2 and supplemental top D2 willprevent the diaphragm being distorted by being forced too far in eitherdirection.

When I utilize my valve as a pressure reducing device to reduce steam,air or gas from a hi her to a lower pressure it is placed in a supp yline aforesaid, the port C being connected to the high pressure. Thechamber A would in this case be charged with air or other expansivefluid to a pressure corresponding to that of the reduced pressurerequired. The reduced pressure is then exerted on the top side of thediaphragm D while the corresponding air pressure acts on the other.

When the reduced pressure -falls below that of the air pressure in thechamber A the diaphragm D is then forced upwardly by the expansion ofair or other expansive iuid stored in the chamber A. The movement of thediaphragm D is transmitted through the lever Fand valve rod C3 to thevalve C5 thus allowing more steam to pass to the low pressure side,which continues until the low pressure exceeds that of the air in thechamber A when the diaphragm is forced downward and the spring Jinstantly forces the valve C5 to its seat and the supply of steam isshutoff, thereby maintaining a constant pressure on the low pressureside of the valve.

The amount of steam which it is desired to pass through the valve C5when it is in its closed position can be controlled by the adjustmen@ ofthe hand wheel K2, and thus prevent any perceptible fluctuation in thepressure on the lower pressure side.

lt will thus be seen Vthat myinvention is not only valuable as anautomatic regulating valve for fan engines, but also as a pressurereducing valve, which is an important desideratum.

It will be seen from this description that by the use of an airreservoir as described, l am enabled to dispense with the use of levers,springs and other analogous devices to counteract the steam pressurewhich has to be regulated. ln fact the diaphragm shown in thedrawingsfloats between the pressure of air on the one side and pressure of steamon the opposite side thereof, so that `the slightest inequality ofpressure on either side causes the diaphragm to move and thereby a mostsensitive regulator is provided.

What l claim as my invention is i 1. In automatic regulating devicesforfan engines andthe like, the combination with the main air reservoirilled with air at a predetermined pressure and hermetically sealed androvided with a top having an orifice therein and a flat outer surface,of a diahragm lying normally parallel with the surface, a sup lementaltop having an inner surface para lel to the plane of the outer surfaceof the top, packing rings holding said diaphragm normally midway andparallel to the outer surface of the top and mner surface of thesupplemental top, the supplemental to being provided with a centralorifice an an outer chamber located and communicatin with the steamline, a valve in the steam ine and means between the valve and the diahragm operated from the diaphragm for adJusting the position of thevalve as and for the purpose specified.

2. In automatic regulating devices for fan engines and the like, thecombination with the main air reservoir filled with air at apredetermined pressure and hermetically sealed and provided with a tophaving an orifice therein and a flat outer surface provided with annularcorrugations forming grooves communicating with each other, of adiaphragm lying normally parallel with the surface of the top, asupplemental top having an inner surface paral e to the plane of theouter surface of the top and provided with annular grooves Acommunicating with each other, packing rings holding said dia hragmnormally midway and parallel in t e outer surface ofthe top and mnersurface of the supplemental to the supplemental top being provided wit acentral orifice and an outer lchamber located and communicating withmeans between the valve and the diaphragm operated from the diaphragmfor a justing t e .position of the valve as specified. engines and thelike, the combination with the main air reservoir filled with air at aprei determined pressure. and hermetically sealed and provided with atop having an orice therein and a flat outer surface, of a diaphragmlying normally parallel with the surace, a supplemental top having aninner surface para lel to the plane of' the outer .surface of the top,diaphragm normally midway and parallel between the outer surfaceV ofthe-top and inner surface-oil the supplemental top, the supplemental topbeing provided with a central orifice and an outer chamber located andthe steam line, a valve in the steam line and 3. x In automaticregulating devices for fan communicating with the steam line, a valveiio packing rings holding said in the steam line, a pin held in thecentral orifice in the supplemental top and provided with a reducedupper end forming a pressure point, a lever `fulcrumed in the chamberand with which. the pressure point contacts in proximity to the fulcrum,the opposite end of said lever operating the valve as and for thepurpose specified.

4. In a device of the class described, the combination with the valvecasing having the U-sha, ed Wall in the center thereof provided Witlli)top and bottom orifices and ports oppositely located in the steam line,of the double valve provided With a screw top, a

nut fitting on the screw top, a rod having a 15 THOMAS MONTGOMERY.

Witnesses: G. F. RooNEY,v R. V. LESUEUR.

